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Investments in Equity Accounted Investees - Summary of Reconciliation of Carrying Amount of Investments in Associates and Joint Ventures (Parenthetical) (Detail) - CAD ($) $ in Thousands |  | 12 Months Ended
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Sep. 27, 2018 | Dec. 31, 2018
MedMen Canada [member] |  |
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items] |  |
Ownership percentage |  | 50.00%
Cronos Australia [member] |  |
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items] |  |
Percentage of ownership interest | 100.00% |
Percentage of capital expenditure funding to be provided | 50.00% |
Percentage of operating expense funding to be provided | 50.00% |
Capital and operating expense funding to be provided | $ 10,000 |
Cronos Australia [member] |  |
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items] |  |
Percentage of ownership interest | 100.00% |
Whistler [member] |  |
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items] |  |
Percentage of voting control |  | 20.00%
Top of Range [member] | Whistler [member] |  |
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items] |  |
Ownership percentage |  | 20.00%
Minimum [member] | MedMen Canada [member] |  |
Disclosure Of Significant Investments In Equity Accounted Investees [Line Items] |  |
License term |  | 20 years

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